I recieved the specs for the new line of Kodak B&W films and I am stuck on a term, "Diffuse rms Granularity" which uses a number as an indicator. Question; the smaller the number the smaller the grain or the larger the number, the smaller the grain?

T-MAX 100 has a number of 8, T-MAX400 a number of 10, TRI-X a number of 16. I assume that the smaller the number, the smaller the grain but would like to know for sure.

Thanks for the help.